Cam and Groove Coupling, Socket, Body Material Aluminum, Type B, Coupling Size 4 in, Male, Connection Type NPT, Hose Fitting Size 4 in, MNPT, Max. Working Pressure @ 70 F 250 psi, Socket Inside Diameter 4 in, Gasket Material Nitrile, Overall Length 4 1/16 in, Includes Locking Arm Yes, Thread Size 4 in -8